数字滤波器是处理数字信号的滤波器,随着电子计算机的发展而得到广泛应用。它实质上是用计算机软件模仿模拟滤波器的功能。但具有下列突出优点:(1)不像模拟网络受元、器件精度限制,滤波精度可大为提高。(2)使用软件,滤波器的规格、参数容易改变。而且用一台微型机既可对多个信号进行滤波,也可对同一信号进行多重滤 Digital filter is a digital signal processing filter, with the development of electronic computers are widely used. It essentially simulates the function of analog filters with computer software. But with the following outstanding advantages: (1) Unlike the analog network by the yuan, the accuracy of the device, the filtering accuracy can be greatly improved. (2) the use of software, filter specifications, easy to change parameters. And with a microcomputer can filter multiple signals, but also on the same signal multiple filter